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https://issues.apache.org/jira/browse/SPARK-2744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14080368#comment-14080368
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meiyoula commented on SPARK-2744:
---------------------------------

Has the meaning been changed? In the release version of spark, it controls how 
many applications are show.

> The configuration "spark.history.retainedApplications" is invalid
> -----------------------------------------------------------------
>
>                 Key: SPARK-2744
>                 URL: https://issues.apache.org/jira/browse/SPARK-2744
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>            Reporter: meiyoula
>              Labels: historyserver
>
> when I set it in spark-env.sh like this:export 
> SPARK_HISTORY_OPTS=$SPARK_HISTORY_OPTS" -Dspark.history.ui.port=5678 
> -Dspark.history.retainedApplications=1 ", the web of historyserver retains 
> more than one application



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